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Title: Fusion of {sup 48}Ca+{sup 90,96}Zr above and below the Coulomb barrier

Abstract

Fusion-evaporation cross sections were measured in the two systems {sup 48}Ca+{sup 90,96}Zr in an energy range from well below to well above the Coulomb barrier. The sub-barrier fusion of {sup 48}Ca+{sup 90}Zr is reproduced by coupled-channels calculations including the lowest quadrupole and octupole vibrations of {sup 90}Zr, and using a Woods-Saxon potential with a standard diffuseness parameter a = 0.68 fm. However, the fusion cross sections are overestimated above the barrier. The low-energy slope of the excitation function for {sup 48}Ca+{sup 96}Zr is steeper. This implies a larger diffuseness parameter a = 0.85 fm. Fusion cross sections are well fit in the whole energy range, and the effect of the strong octupole vibration in {sup 96}Zr is predominant. The extracted fusion barrier distributions are reasonably well reproduced by calculations for both systems. A comparison with previous data for {sup 40}Ca+{sup 90,96}Zr is made in an attempt to clarify the role of transfer couplings in sub-barrier fusion.

Authors:
; ; ; ; ;  [1]; ; ; ;  [2];  [3];  [4]; ; ; ;  [5];  [6]
  1. INFN, Laboratori Nazionali di Legnaro, I-35020 Legnaro (Padova) (Italy)
  2. INFN and Dipartimento di Fisica, Universita di Padova, I-35131 Padova (Italy)
  3. INFN, Sezione di Napoli, I-80126 Naples (Italy)
  4. Ruder Boskovic Institute, HR-10002 Zagreb (Croatia)
  5. China Institute of Atomic Energy, 102413 Beijing (China)
  6. IReS, UMR7500, IN2P3-CNRS/Universite Louis Pasteur, Boite Postale28, F-67037 Strasbourg Cedex 2 (France)
Publication Date:
OSTI Identifier:
20771353
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. C, Nuclear Physics; Journal Volume: 73; Journal Issue: 3; Other Information: DOI: 10.1103/PhysRevC.73.034606; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; CALCIUM 40; CALCIUM 48; COMPARATIVE EVALUATIONS; COULOMB FIELD; COUPLED CHANNEL THEORY; DISTRIBUTION; EXCITATION FUNCTIONS; HEAVY ION FUSION REACTIONS; OCTUPOLES; QUADRUPOLES; WOODS-SAXON POTENTIAL; ZIRCONIUM 90; ZIRCONIUM 96

Citation Formats

Stefanini, A.M., Behera, B.R., Corradi, L., Fioretto, E., Gadea, A., Wu, Y.W., Scarlassara, F., Beghini, S., Montagnoli, G., Silvestri, R., Trotta, M., Szilner, S., Zhang, H.Q., Liu, Z.H., Ruan, M., Yang, F., and Rowley, N.. Fusion of {sup 48}Ca+{sup 90,96}Zr above and below the Coulomb barrier. United States: N. p., 2006. Web. doi:10.1103/PhysRevC.73.034606.
Stefanini, A.M., Behera, B.R., Corradi, L., Fioretto, E., Gadea, A., Wu, Y.W., Scarlassara, F., Beghini, S., Montagnoli, G., Silvestri, R., Trotta, M., Szilner, S., Zhang, H.Q., Liu, Z.H., Ruan, M., Yang, F., & Rowley, N.. Fusion of {sup 48}Ca+{sup 90,96}Zr above and below the Coulomb barrier. United States. doi:10.1103/PhysRevC.73.034606.
Stefanini, A.M., Behera, B.R., Corradi, L., Fioretto, E., Gadea, A., Wu, Y.W., Scarlassara, F., Beghini, S., Montagnoli, G., Silvestri, R., Trotta, M., Szilner, S., Zhang, H.Q., Liu, Z.H., Ruan, M., Yang, F., and Rowley, N.. Wed . "Fusion of {sup 48}Ca+{sup 90,96}Zr above and below the Coulomb barrier". United States. doi:10.1103/PhysRevC.73.034606.
@article{osti_20771353,
title = {Fusion of {sup 48}Ca+{sup 90,96}Zr above and below the Coulomb barrier},
author = {Stefanini, A.M. and Behera, B.R. and Corradi, L. and Fioretto, E. and Gadea, A. and Wu, Y.W. and Scarlassara, F. and Beghini, S. and Montagnoli, G. and Silvestri, R. and Trotta, M. and Szilner, S. and Zhang, H.Q. and Liu, Z.H. and Ruan, M. and Yang, F. and Rowley, N.},
abstractNote = {Fusion-evaporation cross sections were measured in the two systems {sup 48}Ca+{sup 90,96}Zr in an energy range from well below to well above the Coulomb barrier. The sub-barrier fusion of {sup 48}Ca+{sup 90}Zr is reproduced by coupled-channels calculations including the lowest quadrupole and octupole vibrations of {sup 90}Zr, and using a Woods-Saxon potential with a standard diffuseness parameter a = 0.68 fm. However, the fusion cross sections are overestimated above the barrier. The low-energy slope of the excitation function for {sup 48}Ca+{sup 96}Zr is steeper. This implies a larger diffuseness parameter a = 0.85 fm. Fusion cross sections are well fit in the whole energy range, and the effect of the strong octupole vibration in {sup 96}Zr is predominant. The extracted fusion barrier distributions are reasonably well reproduced by calculations for both systems. A comparison with previous data for {sup 40}Ca+{sup 90,96}Zr is made in an attempt to clarify the role of transfer couplings in sub-barrier fusion.},
doi = {10.1103/PhysRevC.73.034606},
journal = {Physical Review. C, Nuclear Physics},
number = 3,
volume = 73,
place = {United States},
year = {Wed Mar 15 00:00:00 EST 2006},
month = {Wed Mar 15 00:00:00 EST 2006}
}